Breaker-plate for grinders.



M. F. W|LL|AMS. BREAKER PLATE FOR GRINDERS.

APPLICATION FILED FEB. 12. I918.

Patented July 30, 1918.

WITNESSES.- 50? IN VE N TOR.

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- hopper bottom tially .in alinementwith STATES PATENT OFFICE.

II'LTON' F. WILLIAMS, OF 8'1. LOUIS, MISSQUR I, ASSIGNOB '10 WILLTLMSPATENT cnusmm To all whom it may concern:

Be it known that'I, Mnzroir F. WILLIAMS,

a citizen of the United States, residing at- St. Louis, State ofMissouri, have invented certain new. and useful Improvements inBreaker-Plates for Grinders, of which the following is a specification.

This invention relates to certain new and useful improvements inbreaker. plates for grinders, the object of which .is to provide meansto effect-a preliminary breaking up 'of the feed, prior to finerreduction on thelower portion of the breaker plate. A further object isto facilitate changing the operation of a mill such as shown in myPatent. 758,288 dated A ril 26. 1904, by substituting the breaker lplject of the present application for the plain breaker plate that is'shown said patent. The peculiarities of construction will be hereinafterdescribed in the specification and particularly pointed out in theclaim.

In the accompanying drawing-on which like reference letters indicatecorresponding parts':' I v Figure 1 represents 'a-vertical cross sectionof a grinder embodying my improvement; and f Fig. 2, a separateperspective view of my one-piece breaker late.

The letter A designates any suitable-housing or casing of a grinder,having a hopper B, the bottom 0 of which inclines downward substantiallytangential to the path of hammers D, pivoted to disks E, keyedto a shaftF, mounted in suitable bearings (not shown) in said housing; An. arcuatecage G, of bars or other suitable construction, cooperates withsaid'hammers in grinding the material till it is fine enough toassthrough the cage, and extends prefer-a 1y from the central horizontallane around toward ,the' where it meets abreaker, plate Hthat is 'flushwith and forms the" continuation of said bottom,and is substaii-s boththe ho er bottomgan'd said cage.

plane n of which is farther away from the path ate that is the sub Theupper breaking face is preferably PULVEBIZEB 00., OF ST. LOUIS,MISSOURI, A CORPORATION OF BREAKER-PLATE FOB GBINDERS.

Masseuse" w s. Patented'July so, 1918. Application ma February 1a, 1 18.Serial No. 218,681.

This 'breaker plate is secured in its opera- ,tive position by, forexample, a wedge key '4 I through asIot-in a back'lug J, and shims K, orotherm'eans to allow ad uStment of the faces, L and M, preferably ofdivergin incl'med lanes, connected by an interme iate reversely inclinedor otherwise formed soas to. constitute a step, the edge of the hammersthan is the lower faceof the breaker plate'. Thus'the higher face L issubstantially a continuation ofthe hopper bottom but'at lesserinclination to the horizontal, while the lower face M is (steeper andsubstantially tangent t0 the arcuatecage.

in Fig. 1, where the feed is shown broken over the fulcrum edge by thehammers, and

sliding down the lower [face into. closer proximity to the path of thehammers,till it is delivered upon the 'arcuate cage.

smoothto facilitate entrance of the feed, but the lower breaker face maybe either smooth,

'or corrugated as indicated at m Fig. 2, or a otherwise, depending onwhichs'tyle is best adapted to hold back and effect the second reducfionof the material being ground.

A, machine of the character described, comprising a suitable housinghaving a feed hopper with a, slan'tbottom, an arcuate cage and rotary.hammers'mounted in said ,housi ing,'a breaker plate located between theend "ofsaid'bottom and the-'adjacent'end of saidcage,"the front of saidplateconsisting of 05 This step therefore. serves in conjunction withthe hammers, as a fulcrumor breakin a'smooth upper face forming acontinuation duction on said cage, substantially as de- 10' of saidslant bottom and flush therewith to scribed.

form a smooth passageway for the feed, a In testimony whereof I haveafl'ixed my lower corrugated falce todgflind' the material signature inthe presence of two witnesses. 6 in-conjunction wit sai ammers and an Iintermediate step between said faces serv- MILTON WILLIAMS ing as afulcrum for preliminary breaking Witnesses:

of the feed by said hammers prior to second H. M. PLAIs'mD,

reduction on the lower face, before final re- WM. G. WEBER.

